Use ConfigService within `main.js` of Nest.js application

Question

I am trying to figure out how I can us my ConfigService created as described here. Within the top-most level of my application.

My main.js file looks like this:

import { NestFactory } from '@nestjs/core';
import { TypeormStore } from 'connect-typeorm';
import * as session from 'express-session';
import { getRepository } from 'typeorm';
import { Session } from '../../domains/session/Session';
import { AppModule } from './AppModule';

async function bootstrap() {
    const app = await NestFactory.create(AppModule);

    app.use(session({
        resave: false,
        saveUninitialized: false,
        store: new TypeormStore({
            cleanupLimit: 2,
            ttl: 86400
        }).connect(getRepository(Session)),
        secret: process.env.COOKIE_SECRET as string
    }))

    await app.listen(3000);
}
bootstrap();

What I'd like is to move process.env.COOKIE_SECRET to a getter inside ConfigService. Can I access services at this level?

Skully · Accepted Answer · 2023-10-20 20:57:19Z

8

To pull any service out from the application context after the factory has created the application (normally after const app = await NestFactory.create(AppModule)) you can then use the app's .get() method to pull out the service for use:

const config = app.get<ConfigService>(ConfigService);

From here, you can use the config methods you've created.

edited Oct 20, 2023 at 20:57

Skully

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answered Nov 24, 2019 at 18:31

Jackie McDoniel

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